- 10 Jun, 2016 14 commits
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Daniel Vetter authored
With the various bits fixed rockchip now has an atomic compliant handling/signalling of crtc_state->event, which means we can just switch over to the new nonblocking helpers and remove some code. v2: Fixes from Tomeu. v3: Send out vblank events correctly when shutting down a crtc for good. This is part of the atomic interface contract. v4: Properly protect vop->event. v5: Add more WARN_ON to check vop->event isn't clobbered. Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Cc: Mark yao <mark.yao@rock-chips.com> Tested-by:
Tomeu Vizoso <tomeu.vizoso@collabora.com> Reviewed-by:
Daniel Vetter <daniel.vetter@intel.com>
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Daniel Vetter authored
It's not permissible to look at plane->state from interrupt context, since doing that would need the irq handler to acquire the plane->mutex lock. The other problem is that if we pipeline updates using the new nonblocking atomic helpers new state gets commit before the irq handler fires, resulting in a lost event. Fix both issues by caching the necessary values in vop_win, protected by dev->event_lock. Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Cc: Mark yao <mark.yao@rock-chips.com> Tested-by:
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Daniel Vetter authored
With atomic helpers there's no need to track the enabled state of a pipe any more, because atomic helpers track this accurately already. Just disable the early returns, since the debug checks might be useful. v2: Don't call drm_helper_disable_unused_functions, it blows up without this check. At least explains why rockchip still needed this old legacy-style state tracing - to work around issues from calling other legacy style functions! Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Cc: Mark yao <mark.yao@rock-chips.com> Tested-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1465388359-8070-18-git-send-email-daniel.vetter@ffwll.ch
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Daniel Vetter authored
With the fixed up drm event handling for crtc_state->event we can just use the helper support for nonblocking commits. Cc: Liviu Dudau <Liviu.Dudau@arm.com> Tested-by:
Liviu Dudau <Liviu.Dudau@arm.com> Acked-by:
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Daniel Vetter authored
Committing with block it is not. Thanks to the fixed up vblank event handling we can just use the helper support for nonblocking commits now. Cc: Carlos Palminha <palminha@synopsys.com> Cc: Alexey Brodkin <abrodkin@synopsys.com> Cc: linux-snps-arc@lists.infradead.org Reviewed-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by:
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Daniel Vetter authored
Design ideas: - split up the actual commit into different phases, and have completions for each of them. This will be useful for the future when we want to interleave phases much more aggressively, for e.g. queue depth > 1. For not it's just a minimal optimization compared to current common nonblocking implementation patterns from drivers, which all stall for the entire commit to complete, including vblank waits and cleanups. - Extract a separate atomic_commit_hw hook since that's the part most drivers will need to overwrite, hopefully allowing even more shared code. - Enforce EBUSY seamntics by attaching one of the completions to the flip_done vblank event. Side benefit of forcing atomic drivers using these helpers to implement event handlign at least semi-correct. I'm evil that way ;-) - Ridiculously modular, as usual. - The main tracking unit for a commit stays struct drm_atomic_state, and the ownership rules for that are unchanged. Ownership still gets transferred to the driver (and subsequently to the worker) on successful commits. What is added is a small, per-crtc, refcounted structure to track pending commits called struct drm_crtc_commit. No actual state is attached to that though, it's purely for ordering and waiting. - Dependencies are implicitly handled by assuming that any CRTC part of &drm_atomic_state is a dependency, and that the current commit must wait for any commits to complete on those CRTC. This way drivers can easily add more depencies using drm_atomic_get_crtc_state(), which is very natural since in most case a dependency exists iff there's some bit of state that needs to be cross checked. Removing depencies is not possible, drivers simply need to be careful to not include every CRTC in a commit if that's not necessary. Which is a good idea anyway, since that also avoids ww_mutex lock contention. - Queue depth > 1 sees some prep work in this patch by adding a stall paramater to drm_atomic_helper_swap_states(). To be able to push commits entirely free-standing and in a deeper queue through the back-end the driver must not access any obj->state pointers. This means we need to track the old state in drm_atomic_state (much easier with the consolidated arrays), and pass them all explicitly to driver backends (this will be serious amounts of churn). Once that's done stall can be set to false in swap_states. v2: Dont ask for flip_done signalling when the CRTC is off and stays off: Drivers don't handle events in that case. Instead complete right away. This way future commits don't need to have special-case logic, but can keep blocking for the flip_done completion. v3: Tons of fixes: - Stall for preceeding commit for real, not the current one by accident. - Add WARN_ON in case drivers don't fire the drm event. - Don't double-free drm events. v4: Make legacy cursor not stall. v5: Extend the helper hook to cover the entire commit tail. Some drivers need special code for cleanup and vblank waiting, this makes it a bit more useful. Inspired by the rockchip driver. v6: Add WARN_ON to catch drivers who forget to send out the drm event. v7: Fixup the stalls in swap_state for real!! v8: - Fixup trailing whitespace, spotted by Maarten. - Actually wait for flip_done in cleanup_done, like the comment says we should do. Thanks a lot for Tomeu for helping with debugging this on. v9: Now with awesome kerneldoc! v10: Split out drm_crtc_commit tracking infrastructure. v: - Add missing static (Gustavo). - Split out the sync functions, only do the actual nonblocking logic in this patch (Maarten). Cc: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Tested-by:
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Daniel Vetter authored
To facilitate easier reviewing this is split out from the overall nonblocking commit rework. It just rolls out the helper functions and uses them in the main drm_atomic_helper_commit() function to make it clear where in the flow they're used. The next patch will actually split drm_atomic_helper_commit() into 2 pieces, with the tail being run asynchronously from a worker. v2: Improve kerneldocs (Maarten). v3: Don't convert ERESTARTSYS to EINTR (Maarten). Also don't fail if the wait succeed in stall_check - we need to convert that case (it returns the remaining jiffies) to 0 for success. v4: Switch to long for wait_for_completion_timeout return value everywhere (Maarten). v5: Fix miscaped function in kerneldoc (Maarten). Reviewed-by:
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Daniel Vetter authored
Split out from my big nonblocking atomic commit helper code as prep work. While add it, also add some neat asciiart to document how it's supposed to be used. v2: Resurrect misplaced hunk in the kerneldoc. v3: Wording improvements from Liviu. Tested-by:
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Daniel Vetter authored
atomic_flush seems to be the right place, right after we commit the plane updates. Again use the fullproof version, since the pipe might be off. Cc: Boris Brezillon <boris.brezillon@free-electrons.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Reviewed-by:
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Daniel Vetter authored
The drm core has a nice ready-made helper for exactly the simple case where it should fire on the next vblank. Note that arming the vblank event in _begin is probably too early, and might easily result in the vblank firing too early, before the new set of planes are actually disabled. But that's kinda a minor issue compared to just outright hanging userspace. v2: Be more robust and either arm, when the CRTC is on, or just send the event out right away. v3: Just unconditionally send out the event directly, for safety - arcpgu doesn't even have vblank support ... Cc: Carlos Palminha <palminha@synopsys.com> Cc: Alexey Brodkin <abrodkin@synopsys.com> Cc: linux-snps-arc@lists.infradead.org Signed-off-by:
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Daniel Vetter authored
- dev is redundant, we have state->atomic - add stall parameter, which must be set when swapping needs to stall for preceeding commits to stop looking at ->state pointers. Currently all drivers need this to be, just prep work for a glorious future. v2: Rebased on top of commit e7cf0963 Author: Gerd Hoffmann <kraxel@redhat.com> Date: Tue May 31 08:50:47 2016 +0200 virtio-gpu: add atomic_commit function Cc: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by:
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Tomeu Vizoso authored
They are deprecated and by moving their implementations to bind/unbind we can call drm_connector_register_all instead of open-coding it. Signed-off-by:
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Brian Norris authored
Rockchip DRM does not yet build properly for ARM64, but we might as well get the printf formatting correct now, to avoid the following warnings: drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c: In function 'rockchip_drm_fbdev_create': drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c:111:2: warning: format '%d' expects argument of type 'int', but argument 8 has type 'size_t' [-Wformat=] DRM_DEBUG_KMS("FB [%dx%d]-%d kvaddr=%p offset=%ld size=%d\n", ^ drivers/gpu/drm/rockchip/rockchip_drm_gem.c: In function 'rockchip_gem_alloc_buf': drivers/gpu/drm/rockchip/rockchip_drm_gem.c:41:3: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'size_t' [-Wformat=] DRM_ERROR("failed to allocate %#x byte dma buffer", obj->size); ^ Signed-off-by:Brian Norris <briannorris@chromium.org> Reviewed-by:
Douglas Anderson <dianders@chromium.org> Tested-by:
Caesar Wang <wxt@rock-chips.com> Signed-off-by:
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Tobias Jakobi authored
The current bitwise AND should result in the same assembler but this is what the code is actually supposed to do. Signed-off-by:
Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Reviewed-by:
Eric Engestrom <eric.engestrom@imgtec.com> Signed-off-by:
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- 09 Jun, 2016 17 commits
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Laurent Pinchart authored
The drm_crtc.c file is a mess, making the ABI documentation confusing since all functions are in the same bag. Split the format-related helpers to a new drm_fourcc.c file. Signed-off-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by:
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Daniel Vetter authored
Just a bit of drive-by ocd. v2: Improve per Liviu's feedback. Cc: Liviu Dudau <Liviu.Dudau@arm.com> Acked-by:
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Daniel Vetter authored
atomic_flush seems to be the right place, but I'm not entirely sure whether this will catch them all. It could be that when disabling the crtc we'll miss the vblank. While at it nuke the dummy functions. v2: Be more robust and either arm, when the CRTC is on, or just send the event out right away. Cc: Xinliang Liu <xinliang.liu@linaro.org> Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com> Cc: Archit Taneja <architt@codeaurora.org> Reviewed-by:
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Daniel Vetter authored
No idea how exactly fsl-du commits hw state changes, but here in flush is probably the safest place. While at it nuke the dummy functions. v2: Be more robust and either arm, when the CRTC is on, or just send the event out right away. Cc: Stefan Agner <stefan@agner.ch> Reviewed-by:
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Daniel Vetter authored
This is just used for cleanup in preclose, and with the reworked event handling code this is now done properly by the core. Nuke it! But it also shows that arc totally fails at sending out drm events for flips. Next patch will hack that up. v2: Rebase it! Cc: Carlos Palminha <palminha@synopsys.com> Cc: Alexey Brodkin <abrodkin@synopsys.com> Cc: linux-snps-arc@lists.infradead.org Reviewed-by:
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Daniel Vetter authored
Drivers transitioning to atomic might not yet want to enable full DRIVER_ATOMIC support when it's not entirely working. But using atomic internally makes a lot more sense earlier. Instead of spreading such flags to more places I figured it's simpler to just check for mode_config->funcs->atomic_commit, and use atomic paths if that is set. For the only driver currently transitioning (i915) this does the right thing. Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by:
Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by:
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Daniel Vetter authored
kernel-doc wants a : at the end. Acked-by: jani.nikula@linux.intel.com Signed-off-by:
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Boris Brezillon authored
All outputs have a 1:1 relationship between connectors and encoders and the driver is relying on the atomic helpers: we can drop the custom ->best_encoder() implementations and let the core call drm_atomic_helper_best_encoder() for us. Signed-off-by:
Vincent Abriou <vincent.abriou@st.com> Signed-off-by:
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Boris Brezillon authored
For all outputs except DSI we have a 1:1 relationship between connectors and encoders and the driver is relying on the atomic helpers: we can drop the custom ->best_encoder() and let the core call drm_atomic_helper_best_encoder() for us. Signed-off-by:
Archit Taneja <architt@codeaurora.org> Signed-off-by:
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Boris Brezillon authored
We have a 1:1 relationship between connectors and encoders and the driver is relying on the atomic helpers: we can drop the custom ->best_encoder() implementation and let the core call drm_atomic_helper_best_encoder() for us. Signed-off-by:
Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by:
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Lukas Wunner authored
The PM core introduced the ability to keep devices runtime suspended during the entire system suspend/resume process with commit aae4518b ("PM / sleep: Mechanism to avoid resuming runtime-suspended devices unnecessarily"). Before this so-called "direct-complete" procedure was introduced, devices were always runtime resumed only to be immediately put to sleep again using their ->suspend hook. Direct-complete is enabled by returning a positive value from the ->prepare hook. The PCI core usually does this automatically. Direct-complete is only available for a device if all children use it as well. Currently we cannot support direct-complete for DRM drivers because the DRM core automatically registers multiple DRM minors which belong to device class drm_class, and drm_class uses a struct dev_pm_ops which lacks the ->prepare callback. While this could be solved by adding the missing ->prepare callback, closer inspection shows that there are no DRM drivers left which declare the legacy ->suspend and ->resume callbacks in their drm_driver struct. The last ones to remove them were i915 with commit 1751fcf9 ("drm/i915: Fix module initialisation, v2.") and exynos with commit e7fefb1d ("drm/exynos: remove legacy ->suspend()/resume()"). Consequently the struct dev_pm_ops of drm_class is now dead code. Remove it. If no dev_pm_ops is declared for a device, the PM core automatically enables direct-complete for it, thereby making that mechanism available to the parent DRM PCI devices. Signed-off-by:
Lukas Wunner <lukas@wunner.de> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linuxDave Airlie authored
omapdrm changes for 4.8 * Update MAINTAINERS file for omapdrm and tilcdc * PLL refactoring to allow versatile use of the PLL clocks * Public omapdss header refactoring to separate omapfb and omapdrm * Gamma table support * Support reset GPIO and vcc regulator in omapdrm's panel-dpi * Minor cleanups * tag 'omapdrm-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (69 commits) drm/omapdrm: Implement gamma_lut atomic crtc properties drm/omapdrm: Workaround for errata i734 (LCD1 Gamma) in DSS dispc drm/omapdrm: Add gamma table support to DSS dispc drm: drm_helper_crtc_enable_color_mgmt() => drm_crtc_enable_color_mgmt() drm/omap: rename panel/encoder Kconfig names drm: omapdrm: add DSI mapping drm: omapdrm: Remove unused omap_framebuffer_bo function drm: omapdrm: Remove unused omap_gem_tiled_size function drm: omapdrm: panel-lgphilips-lb035q02: Remove unused backlight GPIO drm/omap: panel-dpi: implement support for a vcc regulator drm/omap: panel-dpi: make (limited) use of a reset gpio devicetree/bindings: add reset-gpios and vcc-supply for panel-dpi MAINTAINERS: Add maintainer for TI LCDC DRM driver MAINTAINERS: Add maintainer for OMAP DRM driver drm/omap: fix pitch round-up drm/omap: remove align_pitch() drm/omap: remove unnecessary pitch round-up drm/omap: remove unneeded gpio includes drm/omap: Remove the video/omapdss.h and move it's content to local header file [media] omap_vout: Switch to use the video/omapfb_dss.h header file ...
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git://git.kraxel.org/linuxDave Airlie authored
Virtio-gpu updates * 'virtio-gpu-for-airlied' of git://git.kraxel.org/linux: virtio-gpu: use src not crtc virtio-gpu: pick up hotspot from framebuffer add cursor hotspot to drm_framebuffer virtio-gpu: switch to atomic cursor interfaces virtio-gpu: add atomic_commit function virtio-gpu: fix output lookup
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git://anongit.freedesktop.org/drm-intelDave Airlie authored
- some polish for the guc code (Dave Gordon) - big refactoring of gen9 display clock handling code (Ville) - refactoring work in the context code (Chris Wilson) - give encoder/crtc/planes useful names for debug output (Ville) - improvements to skl/kbl wm computation code (Mahesh Kumar) - bunch of smaller improvements all over as usual * tag 'drm-intel-next-2016-06-06' of git://anongit.freedesktop.org/drm-intel: (64 commits) drm/i915: Update DRIVER_DATE to 20160606 drm/i915: Extract physical display dimensions from VBT drm/i915: Silence "unexpected child device config size" for VBT on 845g drm/i915/skl+: Use scaling amount for plane data rate calculation (v4) drm/i915/skl+: calculate plane pixel rate (v4) drm/i915/skl+: calculate ddb minimum allocation (v6) drm/i915: Don't try to calculate relative data rates during hw readout drm/i915: Only ignore eDP ports that are connected drm/i915: Update GEN6_PMINTRMSK setup with GuC enabled drm/i915: kill STANDARD/CURSOR plane screams drm/i915: Give encoders useful names drm/i915: Give meaningful names to all the planes drm/i915: Don't leak primary/cursor planes on crtc init failure drm/i915: Set crtc->name to "pipe A", "pipe B", etc. drm/i915: Use plane->name in debug prints drm/i915: Use crtc->name in debug messages drm/i915: Reject modeset if the dotclock is too high drm/i915: Fix NULL pointer deference when out of PLLs in IVB drm/i915/ilk: Don't disable SSC source if it's in use drm/i915/bxt: Sanitize CDCLK to fix breakage during S4 resume ...
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git://anongit.freedesktop.org/drm-intelDave Airlie authored
As promised, piles of prep work all around: - drm_atomic_state rework, prep for nonblocking commit helpers - fence patches from Gustavo and Christian to prep for atomic fences and some cool work in ttm/amdgpu from Christian - drm event prep for both nonblocking commit and atomic fences - Gustavo seems on a crusade against the non-kms-native version of the vblank functions. - prep work from Boris to nuke all the silly ->best_encoder implementations we have (we really only need that for truly dynamic cases like dvi-i vs dvi-d or dp mst selecting the right transcoder on intel) - prep work from Laurent to rework the format handling functions - and few small things all over * tag 'topic/drm-misc-2016-06-07' of git://anongit.freedesktop.org/drm-intel: (47 commits) drm/dsi: Implement set tear scanline drm/fb_cma_helper: Implement fb_mmap callback drm/qxl: Remove useless drm_fb_get_bpp_depth() call drm/ast: Remove useless drm_fb_get_bpp_depth() call drm/atomic: Fix remaining places where !funcs->best_encoder is valid drm/core: Change declaration for gamma_set. Documentation: add fence-array to kernel DocBook drm/shmobile: use drm_crtc_vblank_{get,put}() drm/radeon: use drm_crtc_vblank_{get,put}() drm/qxl: use drm_crtc_vblank_{get,put}() drm/atmel: use drm_crtc_vblank_{get,put}() drm/armada: use drm_crtc_vblank_{get,put}() drm/amdgpu: use drm_crtc_vblank_{get,put}() drm/virtio: use drm_crtc_send_vblank_event() drm/udl: use drm_crtc_send_vblank_event() drm/qxl: use drm_crtc_send_vblank_event() drm/atmel: use drm_crtc_send_vblank_event() drm/armada: use drm_crtc_send_vblank_event() drm/doc: Switch to sphinx/rst fixed-width quoting drm/doc: Drop kerneldoc for static functions in drm_irq.c ...
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Dave Airlie authored
Merge tag 'topic/lockless-gem-bo-freeing-2016-06-01' of git://anongit.freedesktop.org/drm-intel into drm-next lockless gem bo freeing patches (and the oddball related patch) for all the drivers who's maintainers are asleep at the helm - includes you ;-) I based this on top of drm-fixes to include Chris' fix for the cma issue. * tag 'topic/lockless-gem-bo-freeing-2016-06-01' of git://anongit.freedesktop.org/drm-intel: (21 commits) drm/arcpgu: Use lockless gem BO free callback drm/sun4i: Use lockless gem BO free callback drm/omapdrm: Nuke dummy fb->dirty callback drm/msm: Nuke dummy fb->dirty callback drm/rockchip: Use cma gem vm ops drm/sti: Use lockless gem BO free callback drm: sti: remove useless call to dev->struct_mutex drm/virtio: Use lockless gem BO free callback drm/tilcdc: Use lockless gem BO free callback drm/shmob: Use lockless gem BO free callback drm/rockchip: Use lockless gem BO free callback drm/rcar-du: Use lockless gem BO free callback drm/qxl: Use lockless gem BO free callback drm/nouveau: Use lockless gem BO free callback drm/mga200g: Use lockless gem BO free callback drm/fls-dcu: Use lockless gem BO free callback drm/cirrus: Use lockless gem BO free callback drm/bochs: Use lockless gem BO free callback drm/atmel: Use lockless gem BO free callback drm/ast: Use lockless gem BO free callback ...
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Dave Airlie authored
Daniel has a pull request that relies on stuff in fixes that are in rc2.
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- 07 Jun, 2016 9 commits
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Vinay Simha BN authored
Provide a small convenience wrapper that transmits a set_tear_scanline command. v2: * helper function suggested by Thierry for set_tear_scanline * Also includes small build fixes from Sumit Semwal. v3: one scanline parameter suggested by jani v4: passing the payload properly as suggested by jani Cc: Archit Taneja <archit.taneja@gmail.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Jani Nikula <jani.nikula@linux.intel.com> Signed-off-by:Vinay Simha BN <simhavcs@gmail.com> Reviewed-by:
Sumit Semwal <sumit.semwal@linaro.org> Reviewed-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
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Robin Murphy authored
In the absence of an fb_mmap callback, the fbdev code falls back to a naive implementation which relies upon the DMA address being the same as the physical address, and the buffer being physically contiguous from there. Whilst this often holds for standard CMA allocations via the platform's regular DMA ops, if the allocation is provided by an IOMMU then such assumptions can fall apart spectacularly. To resolve this, reroute the fb_mmap call to the appropriate DMA API implementation, as per the other cma_helper calls. Signed-off-by:
Robin Murphy <robin.murphy@arm.com> Signed-off-by:
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Laurent Pinchart authored
The function has no side effect and its returned values are ignored, don't call it. Signed-off-by:
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Laurent Pinchart authored
The function has no side effect and its returned values are ignored, don't call it. Signed-off-by:
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Boris Brezillon authored
Adapt drm_pick_crtcs() and update_connector_routing() to fallback to drm_atomic_helper_best_encoder() if funcs->best_encoder() is NULL so that DRM drivers can leave this hook unassigned if they know they want to use drm_atomic_helper_best_encoder(). Update the vtables documentation accordingly. Signed-off-by:
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Jyri Sarha authored
Implement gamma_lut atomic crtc properties, set crtc gamma size to 256 for all crtcs and use drm_atomic_helper_legacy_gamma_set() as gamma_set func. The tv-out crtc has 1024 element gamma table (with 10bit precision) in HW, but current Xorg server does not accept anything else but 256 elements so that is used for all CRTCs. The dss dispc API converts table of any length for HW and uses linear interpolation in the process. The default gamma table is restored if gamma_lut property is deleted. Signed-off-by:
Jyri Sarha <jsarha@ti.com> Signed-off-by:
Tomi Valkeinen <tomi.valkeinen@ti.com>
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Jyri Sarha authored
Workaround for errata i734 in DSS dispc - LCD1 Gamma Correction Is Not Working When GFX Pipe Is Disabled For gamma tables to work on LCD1 the GFX plane has to be used at least once after DSS HW has come out of reset. The workaround sets up a minimal LCD setup with GFX plane and waits for one vertical sync irq before disabling the setup and continuing with the context restore. The physical outputs are gated during the operation. For details see: OMAP543x Multimedia Device Silicon Revision 2.0 Silicon Errata Literature Number: SWPZ037E Or some other relevant errata document for the DSS IP version. Signed-off-by:
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Jyri Sarha authored
Add gamma table support to DSS dispc. DSS driver initializes the default gamma table at component bind time and holds a copy of all gamma tables in its internal data structure. Each call to dispc_mgr_set_gamma() updates the internal table and triggers write to the HW, if it is enabled. The tables are restored to HW in PM resume callback. The drivers internal data structure match the HW tables in size and in number of significant bits per color component. The dispc_mgr_set_gamma() converts the size of any given table for the internal data structure using linear interpolation. Default gamma table is restored if NULL is given in place of gamma lut. dispc_mgr_gamma_size() gives HW gamma table size for the channel and returns 0 if gamma table is not supported by the HW or the DSS driver. Signed-off-by:
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Jyri Sarha authored
Add drm_crtc_enable_color_mgmt(), remove drm_helper_crtc_enable_color_mgmt() and update drm/i915-driver (the only user of the old function). The new function is more flexible. It allows driver to enable only the features it has without forcing to enable all three color management properties: degamma lut, csc matrix (ctm), and gamma lut. Suggested-by:
Daniel Vetter <daniel@ffwll.ch> Signed-off-by:
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